Grinding apparatus



ct. 8, 1935., F. A. THOMPSON GRINDING APPARATUS Filed NOV. 5, 1954 fil l l l l INVENTOR.

' H THIIIMF'EEIN.

PHY- BY m4 ATTORNE Patented Oct. 8, 1935 UNITED STATES PATENT OFFICE GRINDING APPARATUS 1 Claim.

The principal object of my invention is to provide a grinding device that permits the lowering and raising of the grinding wheel holding portion.

A further object of this invention is to provide a grinding apparatus that may be easily mounted on an automobile, truck, or like vehicle for portable purposes and when so mounted may use the motive power of the vehicle to rotate its grinding wheel.

' A still further object of my invention is to provide a grinding device capable of attachment on a vehicle that may be easily and quickly placed in an operative position and as easily and quick- .ly placed in an inoperative condition for transportation. 1 1 i A still further object of my invention is to provide a grinding apparatus that requires little room when not in use. 7

A still further object of my invention is to provide a grinding apparatus that has few parts, is economical in manufacture, and is durable in use.

These and other objects will be apparent to those skilled in the art.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attainedas hereinafter more fully set forth,

pointed out in my claim and illustrated in the accompanying drawing, in which:

Fig. 1 is a top plan sectional view of my complete device ready for use.

Fig. 2 is an end sectional View of the method of rotatably securing one end of the grinder housing to a base member.

Fig. 3 is an end sectional View of my device with the grinding wheel holding arm in a horizontal position and with dotted lines showing its position when in a vertical position.

Grinding apparatuses now being used for the sharpening of plows, discs, and, like are of the rigid frame type, making it necessary to lift and hold the item to be sharpened against the grinding element. If the item is heavy, such as units of discs are, this is very difficult of accomplishment. I have overcome such objections by providing a sharpening device that may be moved to and adjusted on the item to'be ground.

Referring to the drawing, I have used the numeral III to designate the elongated housing of the device. The numeral II designates a pipe extending at right angles to the main housing I0 and having its inner end secured to and 55 communicating with the inside of the housing.

These two portions I0 and II provide a casing of T-construction, as shown in Fig. 1. In this connection, I have found it possible to use the ordinary differential and drive shaft housing of an automobile for the housing, as they provide the desired T-construction.

The numeral I2 designates bearing members in the housing III. The numeral I3 designates a shaft rotatably mounted in the bearing members I2. This shaft I3 extends beyond one end of the housing Ill and has secured thereon a pulley wheel I4. The numeral I5 designates a bevel gear in the housing It and on the shaft I3. The numeral I6 designates bearing members in the member II. The numeral I'I designates a shaft rotatably mounted in the bearing members I6. This shaft extends completely through the pipe II and has on its inner end a bevel gear I8 in engagement with the bevel gear I5. The numeral I9 designates a grinding wheel on the outer end of the shaft II and positioned beyond the free end of the pipe II, as shown in Fig. 1.

In order that the member I I- may be manually moved around a fixed axis, I have provided two bearing members 20 which loosely surround each of the end portions of the housing I 0. These bearing members are secured to any suitable base 2| such as a permanent frame in a shop, or the rear springs or like of an automobile. In the drawing, I secure the bearing member 20 to the base 2| by U-bolts 22.

Any motive power may be used to turn the wheel I4 which will, through the shafts and gears, rotate the grinding wheel I9. If the device is secured to an automobile, it may be so adjusted that the pulley wheel I4 engages the rear wheel of the vehicle, or it may be operatively attached by a belt or like. It is then only necessary to jack up the Wheel, start the engine, and put the vehicle transmission in gear. By the grinding wheel holding portion being movable, the grinding wheel may be moved to contact the item to be sharpened. When the device is not in use the member I I may be swung to a vertical out-of-the-way position.

Some changes may be made in the construction and arrangement of myimproved grinding apparatus without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claim any modified forms 50 of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

In a device of the class described, an elongated housing, a bearing member embracing each end of said housing for rotatably supporting the same, a U-bolt embracing each of said bearing mem bers for securing them to a supporting member, spaced apart bearing members in said housing, a shaft rotatably mounted in said last-mentioned bearing members and having one end extending through and from one end of said housing, a gear Wheel on said shaft and inside said housing,

10 a pipe extending at right angles from the cen- 

